Title: Grassy Key Pet-friendly Vacations 2026 | Expedia.com ![](https://images.trvl-media.com/place/2437/83757040-1d80-4589-aea2-a5fe1bb3ba0c.jpg?impolicy=fcrop&w=1200&h=300&q=medium) # Grassy Key Pet-friendly Vacations ## Book a Pet-friendly Hotel + Flight or Car together to unlock savings Photo by Monica Ferro - ## Plan, book, travel with confidence - ### Better together Save up to $1,045 when you book a flight and hotel together\* - ### Find the right fit With over 300,000 hotels worldwide, it's easy to create a perfect package - ### Rest easy Plan, book, and manage your trip all in one place ## Top Pet-friendly Grassy Key Hotels ![Rainbow Bend Resort](https://images.trvl-media.com/lodging/4000000/3870000/3864000/3863945/60a631db_y.jpg?impolicy=resizecrop&rw=340&ch=150) ### Rainbow Bend Resort 57784 Overseas Hwy Marathon FL - 22 min walk from Dolphin Research Center Make it a pet-friendly trip and bring along your four-legged friend. Dogs are welcome (fees apply) at this oceanfront hotel. 8/10 Very Good! (843 reviews) The staff was very helpful. It is an older Motel but they've done some nice upgrades. It has a very beachy feeling. Our room was very clean. Reviewed on Feb 4, 2026 [](https://expedia.com/Marathon-Hotels-Rainbow-Bend-Resort.h3863945.Hotel-Information) ![Grassy Flats Resort & Beach Club](https://images.trvl-media.com/lodging/37000000/36890000/36881900/36881801/e7fc7008_y.jpg?impolicy=resizecrop&rw=340&ch=150) ### Grassy Flats Resort & Beach Club 58182 Overseas Hwy Marathon FL - 14 min walk from Dolphin Research Center This pet-friendly, oceanfront hotel welcomes dogs for an additional fee. Nearby Sunset Park Beach is a good place to stretch your legs if you need a walk. 9.4/10 Exceptional! (386 reviews) Exceptional services. Reviewed on Feb 1, 2026 [](https://expedia.com/Marathon-Hotels-Grassy-Flats-Resort-Beach-Club.h36881801.Hotel-Information) ![Gulf View Waterfront Resort](https://images.trvl-media.com/lodging/14000000/13280000/13278600/13278553/46de1e0c_y.jpg?impolicy=resizecrop&rw=340&ch=150) ### Gulf View Waterfront Resort 58743 OVERSEAS HWY Marathon FL - 4 min walk from Dolphin Research Center Dogs and cats are welcome (fees apply) at this pet-friendly hotel offering pet-approved amenities, like a dog park. For a walk during your stay, seek out nearby ... 8.4/10 Very Good! (547 reviews) Easy checkin online. Easy access to unit. Very clean. A lot of great amenities on the property that we didnt get to use due to weather. Reviewed on Jan 30, 2026 [](https://expedia.com/Marathon-Hotels-Gulf-View-Waterfront-Resort.h13278553.Hotel-Information) [See all 2,298 properties in Grassy Key](https://expedia.com/Hotel-Search?rfrrid=TG.LP.Hotels.Package®ionId=3000451823) Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply. ## More vacations you might like ![](https://forever.travel-assets.com/flex/flexmanager/images/2022/06/08/all-inclusive_holidays_US.jpeg?impolicy=fcrop&w=300&h=300&q=mediumHigh) All Inclusive Vacations [](https://expedia.com/lp/theme-vacations/all-inclusive-vacations?rfrr=editorial.All_Inclusive%20Vacations.click) ![](https://forever.travel-assets.com/flex/flexmanager/images/2022/10/17/XPC_Beach_Overview_HR_v3.jpg?impolicy=fcrop&w=300&h=300&q=mediumHigh) Beach Vacations [](https://expedia.com/lp/theme-vacations/beach-vacations?rfrr=editorial.Beach_Vacations.click) ![](https://forever.travel-assets.com/flex/flexmanager/images/2022/06/08/Family_holidays_US_3_.jpeg?impolicy=fcrop&w=300&h=300&q=mediumHigh) Kid Friendly Vacations [](https://expedia.com/lp/theme-vacations/kid-friendly-vacations?rfrr=editorial.Kid_Friendly%20Vacations.click) 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Savings not available on all packages. ![](https://a.travel-assets.com/mad-service/footer/bnaBanners/BEX_Footer.jpg) ## Go further with the Expedia app Save even more - get up to 20% on select hotels when you book on the app. Our app deals help you to save on trips so you can travel more and manage it all on the go. Scan the QR code with your device camera and download our app